package com.heima.admin.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.admin.mapper.AdChannelMapper;
import com.heima.admin.service.AdChannelService;
import com.heima.model.admin.dtos.ChannelDTO;
import com.heima.model.admin.pojos.AdChannel;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;

import java.util.Date;

@Service
public class AdChannelServiceImpl extends ServiceImpl<AdChannelMapper, AdChannel> implements AdChannelService {


    @Override
    public ResponseResult findByNameAndPage(ChannelDTO dto){
        //参数检验
        if(dto == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
       //分页参数检查
        dto.checkParam();
        //按名称模糊分页查询
        Page page = new Page(dto.getPage(), dto.getSize());
        LambdaQueryWrapper<AdChannel> wrapper = Wrappers.lambdaQuery();
        if(StringUtils.isNotBlank(dto.getName())){
            wrapper.like(AdChannel::getName,dto.getName());
        }

        //排序
        wrapper.orderByAsc(AdChannel::getOrd);

        IPage page1 = page(page, wrapper);
        ResponseResult responseResult = new PageResponseResult(dto.getPage(), dto.getSize(), page1.getTotal());
        responseResult.setData(page1.getRecords());
        return responseResult;
    }

    @Override
    public ResponseResult insert(AdChannel adChannel) {
        //参数检查
        if(adChannel == null ||StringUtils.isBlank(adChannel.getName())) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID,"名称为空");
        }
        if (adChannel.getName().length()>10){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID,"频道名称不能大于10");
        }

        //判断频道是否存在
        LambdaQueryWrapper<AdChannel> wrapper = Wrappers.lambdaQuery();
        wrapper.eq(AdChannel::getName,adChannel.getName());
        int count = this.count(wrapper);
        if(count > 0){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_EXIST,"频道已经存在");
        }
        adChannel.setCreatedTime(new Date());
        this.save(adChannel);
        return ResponseResult.okResult();
    }

    @Override
    public ResponseResult update(AdChannel adChannel) {
        //参数校验
        if(adChannel == null || adChannel.getId() == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //执行修改
        AdChannel channel = getById(adChannel.getId());
        if(channel == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST,"频道信息不存在");
        }

        //校验名称唯一性
        if(StringUtils.isNotBlank(adChannel.getName()) && !adChannel.getName().equals(channel.getName())){
            LambdaQueryWrapper<AdChannel> wrapper = Wrappers.lambdaQuery();
            wrapper.eq(AdChannel::getName,adChannel.getName());
            this.count(wrapper);
            if(count()>0){
                return ResponseResult.errorResult(AppHttpCodeEnum.DATA_EXIST,"该频道已存在");
            }
        }
        this.updateById(adChannel);
        return ResponseResult.okResult();
    }

    @Override
    public ResponseResult deleteById(Integer id) {
        //参数校验
        if(id == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID,"id不存在");
        }
        //判断当前频道是否存在 和 是否有效
        AdChannel adChannel = getById(id);
        if(adChannel == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST,"频道不存在");
        }
        // 启用状态下不能删除
        if(adChannel.getStatus()){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_ALLOW,"有效状态不能删除");
        }
//        int i = 1/0;
        removeById(id);
        return ResponseResult.okResult();
    }
}
